为什么内容类型标头用于json？ "应用/ JSON; charset = utf-8"或“application / json”？ [英] Why content type header to use for json? "application/json; charset=utf-8 " or "application/json"?

问题描述

看起来像json默认编码是UTF-8
Spring mvc默认返回application / json; charset = utf-8并且很难改变它。

looks like the json default encoding is UTF-8 Spring mvc returns "application/json; charset=utf-8 " by default and pretty hard to change it.

推荐答案

根据 RFC 4627

JSON文本应以Unicode编码。默认编码是UTF-8。

JSON text SHALL be encoded in Unicode. The default encoding is UTF-8.

继续描述不同的UTF- *编码将如何检测，这表明没有其他编码支持。

It goes on to describe how the different UTF-* encoding are to be detecting, suggesting that no other encodings are supported.

SHALL代表绝对要求（参见 RFC 2119 ）。

"SHALL" represents an absolute requirement here (see RFC 2119).

并且没有理由使用带有JSON的非UTF编码（因为任何可以处理JSON的东西都可以绝对处理UTF-8）。

And there really is no reason to use a non-UTF encoding with JSON (as anything that can handle JSON can definitely handle UTF-8).

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